Funding for this research was provided by:
Michael J. Fox Foundation for Parkinson's Research (8811.2)
Received: 14 December 2019
Accepted: 17 December 2019
First Online: 23 December 2019
Ethics approval and consent to participate
: This study has been approved by the National Research Ethics service London – Hampstead (10/H0729/21) in addition to approval from brain tissue banks by the UK National Research Ethics Service (07/MRE09/72). All donors had given informed consent for the use of the brains in research.
: The authors declare that they have no competing interests.